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Glob-style pattern matchingGlob-style pattern matching — matches strings against patterns containing '*' (wildcard) and '?' (joker) |
Description
The g_pattern_match* functions match a string
against a pattern containing '*' and '?' wildcards with similar
semantics as the standard glob()
function: '*' matches an arbitrary,
possibly empty, string, '?' matches an arbitrary character.
Note that in contrast to glob()
, the '/' character can be matched by
the wildcards, there are no '[...]' character ranges and '*' and '?'
can not be escaped to include them literally in a pattern.
When multiple strings must be matched against the same pattern, it
is better to compile the pattern to a GPatternSpec using
g_pattern_spec_new()
and use g_pattern_match_string()
instead of
g_pattern_match_simple()
. This avoids the overhead of repeated
pattern compilation.
Functions
g_pattern_spec_new ()
GPatternSpec *
g_pattern_spec_new (const gchar *pattern
);
Compiles a pattern to a GPatternSpec.
g_pattern_spec_free ()
void
g_pattern_spec_free (GPatternSpec *pspec
);
Frees the memory allocated for the GPatternSpec.
g_pattern_spec_equal ()
gboolean g_pattern_spec_equal (GPatternSpec *pspec1
,GPatternSpec *pspec2
);
Compares two compiled pattern specs and returns whether they will match the same set of strings.
g_pattern_match ()
gboolean g_pattern_match (GPatternSpec *pspec
,guint string_length
,const gchar *string
,const gchar *string_reversed
);
Matches a string against a compiled pattern. Passing the correct
length of the string given is mandatory. The reversed string can be
omitted by passing NULL
, this is more efficient if the reversed
version of the string to be matched is not at hand, as
g_pattern_match()
will only construct it if the compiled pattern
requires reverse matches.
Note that, if the user code will (possibly) match a string against a
multitude of patterns containing wildcards, chances are high that
some patterns will require a reversed string. In this case, it's
more efficient to provide the reversed string to avoid multiple
constructions thereof in the various calls to g_pattern_match()
.
Note also that the reverse of a UTF-8 encoded string can in general
not be obtained by g_strreverse()
. This works only if the string
does not contain any multibyte characters. GLib offers the
g_utf8_strreverse()
function to reverse UTF-8 encoded strings.
Parameters
pspec |
||
string_length |
the length of |
|
string |
the UTF-8 encoded string to match |
|
string_reversed |
the reverse of |
[nullable] |
g_pattern_match_string ()
gboolean g_pattern_match_string (GPatternSpec *pspec
,const gchar *string
);
Matches a string against a compiled pattern. If the string is to be
matched against more than one pattern, consider using
g_pattern_match()
instead while supplying the reversed string.
g_pattern_match_simple ()
gboolean g_pattern_match_simple (const gchar *pattern
,const gchar *string
);
Matches a string against a pattern given as a string. If this
function is to be called in a loop, it's more efficient to compile
the pattern once with g_pattern_spec_new()
and call
g_pattern_match_string()
repeatedly.